Jamie-Lynn Sigler is set on "having a second twenties," PEOPLE reports

"I was told what I needed to be in every given moment – what I should and shouldn't say. It was such a weird thing when I was 21 or 22 and just getting into the world," she says. "I didn't know who I was. I was living in an idealistic dream world – like, 'I have a successful show and this handsome man, and I'm 22 and I'm getting married and may have a baby next year!' "

She quickly adds: "But, man, am I glad we didn't have children."